How to delete a node in EB Tree

[xiaoxin]

Hello:
       I am try to delete the proxy because some task. and reload the new 
proxy. and then use check_config_validity.
       but I get the problem that 
       I use  the fallowing code in delete_proxy() (custom function)

                             /* p = proxy */
       786                 if (!p->uuid){
      787                         eb32_delete(&p->conf.id);
      788                 }
         
       I clear all the proxy, but when i use
 
      next_pxid = get_next_id(&used_proxy_id, next_pxid);

      I get "segment fault". 
      I thought the whole tree should be empty, but not. why? 
      Am I using the right eb tree api?
      

Thanks!